For my taste it has too much weight on the right side. The tower is tilted, the chmineys are taller on one side and the little boat falls off the border somehow. It makes my head go sideways.The most beautiful part is the T letter - connection between dash and leg... it has great depth!

I kinda feel like the elements that animateusz mentioned lend themselves to the flow of the composition. I see a swirling motion that describes the trip the little boat is on and leads you through the picture. The leaning buildings, curve of the moon, swooping lettering all contribute to the feeling of movement in the painting. Anyway it looks great!